feat: Add warnings for more deprecated APIs (#21992)

Follow up to https://github.com/denoland/deno/pull/21939 that adds
deprecation warnings to more `Deno` APIs:

- `Deno.copy()`
- `Deno.iter()`
- `Deno.iterSync()`
- `new Deno.Buffer()`
- `Deno.readAll()`
- `Deno.readAllSync()`
- `Deno.writeAll()`
- `Deno.writeAllSync()`
- `Deno.FsWatcher.return`
- `Deno.serveHttp()`
- `Deno.metrics()`

---------

Signed-off-by: Asher Gomez <ashersaupingomez@gmail.com>
Co-authored-by: Asher Gomez <ashersaupingomez@gmail.com>

1 files changed, 16 insertions, 2 deletions

diff --git a/ext/io/12_io.js b/ext/io/12_io.js
index 9f4a3766b..2a0d589a7 100644
--- a/ext/io/12_io.js
+++ b/ext/io/12_io.js
@@ -3,8 +3,7 @@
 // Interfaces 100% copied from Go.
 // Documentation liberally lifted from them too.
 // Thank you! We love Go! <3
-
-import { core, primordials } from "ext:core/mod.js";
+import { core, internals, primordials } from "ext:core/mod.js";
 const {
   op_stdin_set_raw,
   op_is_terminal,
@@ -40,6 +39,11 @@ async function copy(
   dst,
   options,
 ) {
+  internals.warnOnDeprecatedApi(
+    "Deno.copy()",
+    new Error().stack,
+    "Use `copy()` from `https://deno.land/std/io/copy.ts` instead.",
+  );
   let n = 0;
   const bufSize = options?.bufSize ?? DEFAULT_BUFFER_SIZE;
   const b = new Uint8Array(bufSize);
@@ -65,6 +69,11 @@ async function* iter(
   r,
   options,
 ) {
+  internals.warnOnDeprecatedApi(
+    "Deno.iter()",
+    new Error().stack,
+    "Use `ReadableStream` instead.",
+  );
   const bufSize = options?.bufSize ?? DEFAULT_BUFFER_SIZE;
   const b = new Uint8Array(bufSize);
   while (true) {
@@ -81,6 +90,11 @@ function* iterSync(
   r,
   options,
 ) {
+  internals.warnOnDeprecatedApi(
+    "Deno.iterSync()",
+    new Error().stack,
+    "Use `ReadableStream` instead.",
+  );
   const bufSize = options?.bufSize ?? DEFAULT_BUFFER_SIZE;
   const b = new Uint8Array(bufSize);
   while (true) {